Water Evaporator and Condenser Equations
Air conditioner heat loads and evaporator and condenser water flow rates.
Total heat load:
h = c p ρ q dt
= 500 q dt (1)
where
h = heat load (Btu/h)
c p = 1 (Btu/lb m o F) for water
ρ = 8.33 (lb m /gal) for water
q = water volume flow rate (gal/min)
dt = temperature difference ( o F)
Evaporator water flow rate can be expressed as
q evap = 24 h evap / dt (2)
where
q evap = evaporator water flow rate (gallons per minute - gpm)
h evap = air condition load ( 1 refrigeration ton = 1 TONS cond = 12,000 Btu /h = 200 Btu/min = 3,025.9 k Calories /h = 12,661 kJ/h = 3517 kJ/s = 3517 kW = 4713 HP )
Condenser water flow rate can be expressed as
q cond = 30 h cond / dt (3)
where
q cond = condenser water flow rate (gallons per minute - gpm)
h cond = air condition load, chiller tonnage ( 1 cooling tower ton = 1 TONS evap = 1 TONS cond x 1.25 = 15,000 Btu/h = 3,782 k Calories/h = 15,826 kJ/h )
Related Topics
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Air Conditioning
Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort.
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